You fly in it every day. How much do you know about weather?

1. 1) Which type of fog is associated with moist air moving over a cool surface?
   Live from the Flight Deck

   Advection fog is associated with moist air moving over a cooler surface.

   Advection fog is associated with moist air moving over a cooler surface.

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2. 2) Which one of these answers describes a low pressure system near the surface in the northern hemisphere?

   A low pressure system at the surface flows counter-clockwise and converges at the center of the low pressure system.

   A low pressure system at the surface flows counter-clockwise and converges at the center of the low pressure system.

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3. 3) You're at Los Angeles International airport (125' MSL) and it's a standard day (ISA). Approximately what altitude would you find a temperature of -1 degrees Celsius?

   The standard lapse rate is 2 degrees for every thousand feet. ISA standard temperature is 15 degrees at sea level. The difference between 15 and -1 is 16 degrees. Dividing this value by 2 (two degrees per thousand feet) gives you 8. Multiply that by 1,000 and you get an altitude of 8,000 feet.

   The standard lapse rate is 2 degrees for every thousand feet. ISA standard temperature is 15 degrees at sea level. The difference between 15 and -1 is 16 degrees. Dividing this value by 2 (two degrees per thousand feet) gives you 8. Multiply that by 1,000 and you get an altitude of 8,000 feet.

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4. 4) What does a thunderstorm need to form?
   Boldmethod

   High humidity, unstable atmosphere, and a lifting force are the ingredients needed to make a thunderstorm.

   High humidity, unstable atmosphere, and a lifting force are the ingredients needed to make a thunderstorm.

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5. 5) What type of cloud is this, and what weather is associated with it?
   Ironpiping

   Nimbostratus is a type of cloud associated with a thick gray cloud layer, and rain or snow without lightning or thunder.

   Nimbostratus is a type of cloud associated with a thick gray cloud layer, and rain or snow without lightning or thunder.

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6. 6) What type of ice did this aircraft accumulate?
   NASA / Lewis Research Center

   Mixed ice is a cloudy combination of clear and rime ice. It's often found in stratiform clouds, with the most intense icing near the top of the cloud. 

   Mixed ice is a cloudy combination of clear and rime ice. It's often found in stratiform clouds, with the most intense icing near the top of the cloud. 

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